写logo

 public static void WriteErrorLog(Exception ex)
        {
            string LOG_FOLDER = AppDomain.CurrentDomain.BaseDirectory + "Log";
            try
            {
                //日志文件路径
                filePath = LOG_FOLDER + "\\" + "ErrorLog" + ".txt";
                if (!System.IO.Directory.Exists(LOG_FOLDER))
                {
                    Directory.CreateDirectory(LOG_FOLDER);
                }
                if (!File.Exists(filePath))//如果文件不存在
                {
                    File.Create(filePath);
                }
                StreamWriter sw = File.AppendText(filePath);
                sw.WriteLine("-------------------------------------------------------------------------------------");
                sw.WriteLine("Date:" + DateTime.Now.ToShortDateString() + " Time:" + DateTime.Now.ToShortTimeString());
                sw.WriteLine(ex.Message);
                sw.WriteLine(ex.StackTrace);
                sw.WriteLine();
                sw.Close();
            }
            catch (Exception)
            {
                //throw;
            }
        } 

上面的,经常出现"**文件正由另一进程使用，因此该进程无法访问该文件"！！！！！！！！！！！！！！！

下面：

publicstaticvoid WriteLog(string _msg)
    {
        string folder = System.Web.HttpContext.Current.Server.MapPath("~/log");
        if (!Directory.Exists(folder)) Directory.CreateDirectory(folder);

        string filename = folder +"/"+ DateTime.Now.ToShortDateString() +".txt";
        if (File.Exists(filename))
        {
            FileStream fs =new FileStream(filename, FileMode.Append, FileAccess.Write, FileShare.ReadWrite);
            StreamWriter sr =new StreamWriter(fs);
            sr.WriteLine(DateTime.Now.ToString("HH:mm:ss") +"\t"+ _msg);
            sr.Close();
            fs.Close();
        }
        else
        {
            FileStream fs =new FileStream(filename, FileMode.Create, FileAccess.Write, FileShare.ReadWrite);
            StreamWriter sr =new StreamWriter(fs);
            sr.WriteLine(DateTime.Now.ToString("HH:mm:ss") +"\t"+ _msg);
            sr.Close();
            fs.Close();
        }      
    }